Just to say that I've just used this plugin to add spawns on de_strike_rc4, and the plugin worked perfectly fine (I run it on a linux cs:s server).
However, I had to change the permissions of addons/sourcemod/configs/spawntools7 folder and files.
It was created with "strange" insuffisant permissions:
Here we can see that the owner can not even read or write the files contained in spawntools7 folder. I had to do a chmod 755 on the folder recursively, change map, and restart editing. After I saved and quit, there I could see the file de_strike_rc4.cfg.
I don't know if there is a way to change this, I'm just reporting.
Apart from that, it is such a great tool.